Let’s designing a PIR motion sensor circuit that uses a Passive Infrared (PIR) sensor to control a buzzer through a 555 timer for motion detection applications. Here’s a step-by-step guide to creating this circuit: Components Needed: PIR sensor 555 timer IC Buzzer Resistors (various shown below) Capacitors (various shown below) NPN transistor (e.g., 2N2222 or […]
Protection Circuits
Current Switching Circuit using Arduino
Hello friends, Current Switching Circuit using Arduino? Do you know how to switch between two power supplies or current sources using Arduino and Relays? Welcome to another interesting article, suppose you want to operate a device that can be operated based on the room temperature or a temperature inside the device, let’s understand this with […]
Over Voltage Protection Circuit Diagram Based on Relay
In this tutorial, you will learn how to make this over-voltage protection circuit. It requires fewer components and is very effective in overvoltage conditions. It will cost you around 3$ to 5$ depending on the quality of components. Overvoltage occurs when the voltage in a circuit is raised above its upper design limits. This condition […]
Over Current/Short Circuit Protection Using LM358 OPAMP
This is an adjustable over-current and Short circuit protection using LM358 OPAMP. In this article, we will see how you can make short circuit protection using LM358 OPAMP. A short circuit occurs when the current flowing in a circuit bypasses the load and flows from a path having the least or zero resistance. We can […]
Short Circuit Protection Using Relay For Batteries
In this tutorial, we will see how to make a short circuit protection using Relay. Many times accidentally terminals of batteries and other power supplies get short-circuited. Due to this, they get hot and start degrading. In the case of lithium-ion or lithium-polymer batteries, they may catch fire due to short-circuit or even get blast. […]